基于CAD几何模型的曲面流线可视分析方法*吴付坤1,2,曹轶2,董庆利1,2(1.中物院高性能数值模拟软件中心,北京100088;2.北京应用物理与计算数学研究所,北京100088)摘要:针对在大规模矢量场中复杂几何曲面流线生成难的问题,设计实现了一种高精度的复杂曲面流线可视分析方法。首先,基于拓扑二维曲面结构进行求交计算,并引入高精度插值算法实现几何曲面矢量场并行抽取操作;然后,采用改进型龙格-库塔矢量场流线积分扩展技术进行积分计算,并引入自适应积分步长策略和流线-曲面求交加速结构,生成连续一致的曲面流线;最后,引入小球特征到可视化管线流程中,并集成于通用可视分析平台。实验结果表明,该方法能够高精度地生成连续一致的几何曲面流线,有效刻画复杂装置表面流场物理特性。关键词:矢量场抽取;流线积分扩展技术;自适应积分步长;流线-曲面求交加速结构中图分类号:TP301文献标志码:Adoi:10.3969/j.issn.1007-130X.2023.06.002AvisualanalysismethodofcurvedsurfacestreamlinebasedonCADgeometricmodelWUFu-kun1,2,CAOYi2,DONGQing-li1,2(1.CAEPSoftwareCenterforHighPerformanceNumericalSimulation,Beijing100088;2.InstituteofAppliedPhysicsandComputationalMathematics,Beijing100088,China)Abstract:Toaddressthegenerationproblemofsurfacestreamlineoncomplexgeometryinlarge-scalevectorfield,wedesignandimplementahigh-precisionvisualanalysismethodofcomplexgeomet-ricsurfacestreamline.Thismethodfirstperformstheintersectioncalculationbasedonthecomplexto-pologicaltwo-dimensionalsurfacestructure,andintroducesahigh-precisioninterpolationalgorithmtoachieveeffectivevectorextractionofthegeometricsurface.Then,animprovedRunge-Kuttastreamlineintegrationextensiontechnologyforvectorfieldisappliedforintegrationcalculation,wheretheadaptiveintegrationstepstrategyandstreamline-surfaceintersectionaccelerationstructureisintroduced,inordertogeneratecontinuousandconsistentsurfacestreamline.Finally,thismethodaddstheballfeaturetothevisualizationpipelineprocess,andisintegratedintothegeneralvisualizationanalysisplatform.Ex-perimentalresultsshowthatthemethodcangeneratecontinuousandconsistentgeometricsurfacestreamlineswithhighprecision,andeffectivelycharacterizethephysicalcharacteristicso...
